Me rage-rage yawan iyakacin duniya Bears a cikin Arctic?

White, ko wani iyakacin duniya bear - mai iko da kyau dabba, a gaskiya alama ce da Arctic. Duk da haka, da 'yan asalin mazaunan Arewa ne a karkashin barazana. Yawan iyakacin duniya Bears a cikin Arctic ya rage ƙwarai a cikin 'yan shekarun nan. Masana kimiyya sun ce rabin karni daga baya suka iya ba zauna a duniya. A 2008, na iyakacin duniya bear da aka ayyana wani namun dajin, da kuma kawo a cikin Red Littãfi.

Me rage-rage yawan iyakacin duniya bears?

Masana kimiyya, Dabbobi ba dalilai da dama rage iyakacin duniya bear yawan jama'a. halitta da kuma anthropogenic dalilai za a iya bambanta tsakanin su.

Daya daga cikin manyan dalilan rage yawan iyakacin duniya beyar, za a iya gani a matsayin ɗumamar duniya da kuma hade raguwa a yankin na iyakacin duniya kankara. Wannan karfi da rinjayar da rai na iyakacin duniya bear, kamar yadda wannan dabba Zaune nemi like. A cikin shekaru 30 da shekaru, yankin na kankara a cikin Arctic Ocean shrank zuwa 5,02 miliyan murabba'in mita. km vs. talakawan darajar a kan miliyan 7 sq. km.

sauyin yanayi Warming

Canjin yanayi ya jagoranci wani Warming na ruwa a kudancin na Arctic Ocean. Wasu coldwater kifi (misali, Arctic cod) sun tafi a cikin mafi arewacin yankunan. Kuma bãyansu, kuma ya matsa da yawan jama'a na ringed like, wanda aka farauta iyakacin duniya bear. Part na beyar ya tafi domin like a arewa, da kuma sauran yana fuskantar babban matsaloli tare da abinci. A sakamakon haka, bears fara ciyar da ba su saba da abinci - tsuntsaye 'qwai, lemmings, berries.

Yunwa ta fara addabar dabbobi ƙara zo adam habitation. A search na abinci, suka yi bincike da datti da kuma landfills, suna da ha ari ga mutane. Irin wannan dabbobi suna harbe, cewa kuma bayyana dalilin da ya sa rage yawan iyakacin duniya Bears.

Har ila yau, cin abinci sharar gida, su sau da yawa hadiye da irin wannan m abubuwa, kamar roba fim, nailan raga for kayayyakin, guda na gilashi, ciyawa saurã daga iyali da magunguna.

hanyar rayuwa

Wannan iko da kuma agile dabba mai vagrant. A cikin bazara, lokacin da kankara farawa dab, iyakacin duniya bears zuwa arewa. Gantali daga kankara floe to kankara floe, sun yi dogon tsalle. A kankara ruwa da suka nutse a lokacin farauta, ko su matsa zuwa wani kankara floe.

Climate Warming ya kai ga cewa sakamakon kankara zama sirara kuma kasa m. Ya sauƙi karya saukar da crumbles kan tasiri. Saboda haka, na iyakacin duniya Bears yi iyo ƙara nisa fiye da da. Wannan shi ne saboda wata babbar sharar gida na makamashi, wajen, da kuma abinci ga dawo da daukan tsawon. Sun ma kawai ba zai iya sãmi ĩko irin wannan tafiya, kuma nutsar.

Saboda canza kankara yanayi da yawa bears ba su sarrafa don koma zuwa ƙasar da ka ci gaba da tseren. Ƙara, sun yi tono na haihuwa dajin kai tsaye a kan kankara, wanda kara hadarin mutuwa da kuma yara, kuma mafi bear. Bayan bayyanar kwiyakwiyanta, da kuma ciyar da su daukan ta mai yawa ƙarfi, kuma fita daga dajin farautar shi iya ba muddin yara ba za su iya bi da shi.

farauta

Wani dalilin da ya sa rage yawan iyakacin duniya bears ne farautar. Duk da yake sun kasance farauta kawai ga 'yan asalin mutanen da Arewa, shi ya ba m. Amma lokacin da take dauke da shi ya fara farautar tare da zamani makamai, ta amfani da jirage masu saukar ungulu, da yawan harbe dabbobi ya kara da cika fuska. Shirya yawon shakatawa ga dukan farauta na iyakacin duniya Bears. Kuma fata na kashe Arctic predator sa'an nan da nuna alfahari nuna baƙi.

Yanzu na iyakacin duniya bear ne kare, amma mafarauta ne ba wata matsala ba.

cuta

Masana kimiyya suna kokarin more daidai sanin ko me ya sa rage yawan iyakacin duniya Bears. A amsoshi ne daban-daban. Daga cikin dalilan shi ne ake kira ma cututtuka irin qwayoyin cutuka masu halin. Yana ne ya sa ta parasites, ya magance a cikin tsokoki na dabbobi. Bugu da kari a iyakacin duniya take ɗauke su har yanzu samun lafiya Foxes, seleji karnuka, like. Wasu yi imani da cewa wannan cuta sun kawo mutane zuwa Arewa.

Babu shakka cewa iyakacin duniya bears bukatar kariya. In ba haka ba, mu jikoki iya taba sani ba game da karfi da kuma mamaki kyau dabba Arctic makiyaya da suka rayu a cikin matsananci Arewa.